switch from glOrtho to gluPerspective
- by Knitex
I have a car draw at (0,0) and some obstacles set up but right now my main concern is switching from glPerspective to glOrtho and vice-versa. All that i get when i switch from perspective to ortho is a black screen.
void myinit(){
glClearColor(0.0,0.0,0.0,0.0);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(60,ww/wh,1,100);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
gluLookAt(-5,5,3,backcarx,topcarx,0,0,0,1);
}
void menu(int id){
/*menu selects if you want to view it in ortho or perspective*/
if(id == 1){
glClear(GL_DEPTH_BUFFER_BIT);
glViewport(0,0,ww,wh);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(-2,100,-2,100,-1,1);
glMatrixMode(GL_MODELVIEW);
glutPostRedisplay();
}
if(id == 2){
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(60,ww/wh,1,100);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
viewx = backcarx - 10;
viewy = backcary - 10;
gluLookAt(viewx,viewy,viewz,backcarx,topcarx,0,0,0,1);
}
}
i've tried using the clear depth buffer and still doesnt work.
